@article {Lipow893,
author = {Lipow, Sara R. and Wyatt, Robert},
title = {Single Gene Control of Postzygotic Self-Incompatibility in Poke Milkweed, Asclepias exaltata L.},
volume = {154},
number = {2},
pages = {893--907},
year = {2000},
publisher = {Genetics},
abstract = {Most individuals of Asclepias exaltata are self-sterile, but all plants lack prezygotic barriers to self-fertilization. To determine whether postzygotic rejection of self-fertilized ovules is due to late-acting self-incompatibility or to extreme, early acting inbreeding depression, we performed three diallel crosses among self-sterile plants related as full-sibs. The full-sibs segregated into four compatibility classes, suggesting that late acting self-incompatibility is controlled by a single gene (S-locus). Crosses between plants sharing one or both alleles at the S-locus are incompatible. An additional diallel cross was done among full-sib progeny from a cross of a self-sterile and a self-fertile plant. These progeny grouped into two compatibility classes, and plants within classes displayed varying levels of self-fertility. This suggests that the occasional self-fertility documented in natural pollinations is caused by pseudo-self-fertility alleles that alter the functioning of the S-locus.},
issn = {0016-6731},
URL = {https://www.genetics.org/content/154/2/893},
eprint = {https://www.genetics.org/content/154/2/893.full.pdf},
journal = {Genetics}
}